傳動軸組件近淨形鍛造技術

The Development of Near Net Shape Forging Process for Bell Type Outer Race of Driveshaft

黃廣淼(Guang-Miao Huang)

《鍛造》 9卷4期 (2000/11) Pp. 64-72

https://doi.org/10.29791/Forging.200011.0006

摘要

汽車傳動軸組件中的等速接頭（Constant Velocity Joint）外輸（Outer Race）分為TJ（Tripod Type Joint）和BJ（Bell Type Joint）兩種類型，本文則著重於對BJ製程的探討。一段來說，BJ鍛件業界大多採用全熱間鍛造或全冷間鍛造製程來生產，前者工程道次少且鍛件精度較差，必須配合大量後續機械加工：後者鍛件度佳，但需配合多次製程退火與磷酸鹽皮膜處理，工程道次多，成本相對較高。因此近年BJ的生產已朝向『溫間鍛造＋冷間頸縮』的複合鍛造製程。本複合鍛造製程可使鍛件球軌精度達IT10級，因此內徑與球軌部位僅需少量研磨，配上外徑局部加工後經熱處理即可組裝成品，達到減少製程道次，降低製造成本的目的。

並列摘要

The Outer race of constant velocity joint for driveshaft of automobile has two types, one is TJ (Tripod Type Joint) and the other is BJ (Bell Type Joint), This study is major on the forging process of the BJ. In general, forging shops use hot forging or cold forging technology to produce this kind of products. The former has less process steps and the accuracy of forging parts is not good. That’s why it needs much machining work. The latter can get precision forging parts, but annealing and phosphate are needed during forging process. The cost of the cold forging technology is higher than the cost of the hot forging technology. The trend of forging technology is to use wan forging plus cold ironing, which combine the characteristics and advantages of hot and cold forging technologies. We develop hybrid-forging process to produce BJ. The accuracy of the groove dimension can achieve IT 10 by using this hybrid forging process. The advantages of this hybrid forging process are process steps reduced and the machining cost as well.